This new format is a nice way to show roughly how these current-generation cards compare. I definitely want to see the legacy chart stay too though, as it helps provide a rough estimation of how old cards compare to newer ones.
The testing methodology for the new chart doesn't really seem up to par though. Basing numbers on performance in just 3 games is not going to provide particularly accurate results, especially when 2 of the 3 are running at resolutions that some of the cards aren't even designed to handle. If the choice of resolution is going to reposition cards in the chart, why not provide separate results for different resolutions? The vast majority of people are still gaming at resolutions of 1080p or below, so that should be the most relevant resolution to test. If someone is gaming at 1440p or higher with a higher-end card, then they are probably also more likely to read reviews, and less likely to need a chart like this.
I must say that I prefer the performance summary charts included in TechPowerUp's reviews, as they not only provide separate charts for 1080p, 1440p and 2160p, but they also base the results on the combined performance of the 20+ games in their test suite, preventing anomalous results in any one title from throwing off the average too much. Plus, they make the actual frame rate results for each game available in separate charts, so one can get an idea of whether a certain difference in performance might even be relevant at a given refresh rate, and in the games they actually play. Tom's of course provides much more detailed results for each game tested in their reviews, but that doesn't apply in a summary like this. I would at the very least like to see more games being used to calculate these results.